How effective is pull out and birth control used together?

Patient: Doctor,I am on my new cycle of birth control pills. I have take them everyday so far and am about to start day 10. I had unprotected sex with my boyfriend the night before I was supposed to take the seventh pill that stops ovulation. He did not ejaculate inside me, nor did he ejaculate at all throughout the whole routine. He had not ejaculated for about three days before that and had urinated often. He pulled out because he thought he was going to ejaculate, but he did not end up doing so. What are my chances of being pregnant?